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Transformers are the vital section of transmission and distribution electrical network. In addition, they are the most expensive investment in the network. Therefore, they should be evaluated for proper working and monitor regularly to assess normal condition and life expectancy. Obviously, the health of transformer is strictly depending on transformer's insulation conditions, oil and paper, that...
Furan derivatives (2-acetyl furan, 2-furfural, 5-methyl-2-furfural, 5-hydroxymethyl 2-furfural, and 2-furfurylalcohol) presence in transformer oil are the key indicators of the solid dielectric degradation. In recent technology, such deterioration is measured according to ASTM D 5837 standard. However, the method requires very expensive and sophisticated equipment like High-Performance Liquid Chromatography...
This paper summarizes the experience of an electric power utility in the use of furan-in-oil analysis to detect thermal degradation of cellulose materials in oil filled power transformers used in generation, transmission and distribution.
Furans concentration presence in aged-transformer oil has been one of the key indicators of the solid dielectric deterioration. They are the by-products from the cellulose degradation of insulation paper caused by heat, oxidation and electrical stress. Nowadays, furans concentration is measured by high-performance liquid chromatography (HPLC) or gas chromatography-mass spectrometry (GC/MS) based on...
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